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NEW QUESTION # 11
Which two statements are true in regards to starting the Exadata Virtual Machine?
- A. To streamline the diagnosis of virtual machines, one ISO file is used for multiple Oracle Exadata System Software releases.
- B. To see Oracle Linux boot messages during guest startup, use -console option with the vm_maker -start-domain command.
- C. Use vm_maker boot-from-iso command to boot a virtual machine.
- D. Use vm_maker -auto-start command to configure a virtual machine to start automatically when the KVM host is started.
- E. Use vm_maker -start-domain to start a virtual machine manually.
Answer: D,E
NEW QUESTION # 12
You have been notified by your Network Administrator that an upstream switch has been replaced due to a hardware fault. Which command verifies that the client network on your Exadata X9M-2 Database Server is available via both client switches?
- A. cat /proc/net/bonding/bondeth0
- B. netstat -rn
- C. ifconfig -a legrep "re0| re1"
- D. /opt/oracle.SupportTools/ibdiagtools/checkbadlinks.p1 -all
Answer: A
Explanation:
According to Oracle's documentation1, the client network on Exadata X9M-2 Database Server is used for client access to the database servers using Single Client Access Name (SCAN) and Oracle RAC Virtual IP (VIP) addresses. To verify that the client network is available via both client switches, you can use the command:
cat /proc/net/bonding/bondeth0
This command displays information about the bondeth0 interface, which is used for the client network on Exadata X9M-2 Database Server2. You can check if both interfaces (eth0 and eth1) are active and connected to different switches3.
NEW QUESTION # 13
You are updating your Exadata X9M-2 Elastic Database Machine with 6 database servers and 12 High Capacity Storage Servers. You will be using patchmgr to apply updates across the entire machine while still maintaining database availability.
Assuming you are driving patchmgr from an external server, which statement is true about the execution phase?
- A. patchmgr must be invoked with the -rolling argument. Each component type must be upgraded independently of the other.
- B. patchmgr cannot apply updates in a rolling manner, you must manually apply patches with the dbnodeudpate and cellupdate tools if high availability is required.
- C. patchmgr will apply patches in component groups consisting of 1 database server and 2 storage servers to minimize disruption.
- D. patchmgr must be invoked with the -rolling argument with all database and storage servers listed in a single input file.
Answer: C
Explanation:
According to the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book [1], patchmgr can be used to apply updates in a rolling manner while still maintaining database availability. It will apply patches in component groups consisting of 1 database server and 2 storage servers to minimize disruption. This is done by invoking patchmgr with the -rolling argument and specifying the component groups in the input file.
NEW QUESTION # 14
Which two options can be used to identify a damaged or failing flash card on an X9M-2 Database Machine High Capacity storage server?
- A. hardware monitoring using the storage server ILOM
- B. using the CELLCLI CALIBRATE command on the storage server after logging in as the root user
- C. using the CELLCLI list LUN DETAIL command as the celladmin user
- D. using the CELLCLI CALIBRATE command on the storage server after logging in as the celladmin user
Answer: A,C
NEW QUESTION # 15
You have been notified by your Network Administrator that an upstream switch has been replaced due to a hardware fault. Which command verifies that the client network on your Exadata X9M-2 Database Server is available via both client switches?
- A. /opt/oracle.SupportTools/ibdiagtools/checkbadlinks.p1 -all
- B. netstat -rn
- C. ifconfig -a legrep "re0| re1"
- D. cat /proc/net/bonding/bondeth0
Answer: A
NEW QUESTION # 16
What are the two benefits of using Oracle Exadata Deployment Assistant (OEDA)?
- A. OEDA provides a CL1 which supports life cycle management tasks for Exadata systems only.
- B. OEDA gathers configuration details and creates the Oracle Exadata Rack configuration file.
- C. OEDA Web-based user interface cannot import OEDA XML configuration files created with the Java-based version of OEDA without conversion
- D. OEDA facilitates abstracting hardware.
- E. OEDA is used for Oracle Exadata Database Machine, Zero Data Loss Recovery Appliance, Private Cloud Appliance, and SuperCluster.
Answer: A,B
Explanation:
Oracle Exadata Deployment Assistant (OEDA) offers multiple benefits for configuring and deploying Exadata systems:
Configuration Gathering and Rack File Creation: OEDA simplifies the setup of Exadata environments by collecting system-specific configuration details. It uses this information to generate the Exadata Rack configuration file, which outlines the optimal setup for the particular environment, streamlining the deployment process and ensuring compatibility with Oracle best practices .
Lifecycle Management CLI for Exadata Systems: OEDA includes a command-line interface (CLI) that facilitates various lifecycle management tasks, specifically designed for Exadata systems. This CLI helps in automating deployment steps, adjusting configurations, and updating system parameters, tailored specifically for Exadata's hardware and software environment .
NEW QUESTION # 17
You are planning the monitoring configuration for your Exadata X9M Database Machine.
Which three components are monitored directly through the use of Exadata-specific Enterprise Manager Plug-Ins?
- A. Hybrid Columnar Compression (HCC) ratios on Extended (XT) storage servers
- B. the RDMA over Converged Ethernet (RoCE) switches
- C. the Power Distribution Units (PDUs)
- D. the storage server ILOM
- E. Oracle clusterware on the database server
- F. ASM instances
Answer: A,E,F
Explanation:
Exadata-specific Enterprise Manager Plug-Ins are used to monitor different components of the Exadata Database Machine.
1. ASM instances: The Automatic Storage Management (ASM) instances can be monitored directly through the use of Exadata-specific Enterprise Manager Plug-Ins. This allows you to monitor the storage space, disk usage, and performance of the ASM instances.
2. Hybrid Columnar Compression (HCC) ratios on Extended (XT) storage servers: The HCC ratios on Extended (XT) storage servers can be monitored directly through the use of Exadata-specific Enterprise Manager Plug-Ins. This allows you to monitor the compression ratios and performance of the storage servers.
3. Oracle clusterware on the database server: The Oracle clusterware on the database server can be monitored directly through the use of Exadata-specific Enterprise Manager Plug-Ins. This allows you to monitor the health and performance of the clusterware.
NEW QUESTION # 18
Which are two valid reasons for executing an X9M-2 Exadata storage server rescue procedure?
- A. the failure of physical disk 0 and 11
- B. corruption in the / (root) filesystem
- C. moving all disks from one cell to another as part of a chassis-level component failure
- D. the failure of both physical M.2 disks
- E. corruption in a normal or high redundancy ASM diskgroup
- F. the failure of physical disk 1
- G. accidental loss of all data from all griddisks in a storage server
Answer: B,D
Explanation:
The two valid reasons are:
corruption in the / (root) filesystem . According to 1, this is one of the scenarios that requires a storage server rescue procedure , because it prevents the storage server from booting up normally . The rescue procedure will re-image the root filesystem with a fresh copy of the operating system and restore the configuration files from a backup1.
the failure of both physical M.2 disks . According to 2, each Exadata Storage Server X9M-2 has two physical M.2 disks that store the operating system and configuration files for the storage server . If both M.2 disks fail , then the storage server cannot boot up or function properly . The rescue procedure will replace the failed M.2 disks with new ones and re-image them with the operating system and configuration files2.
NEW QUESTION # 19
What is the minimum Oracle Linux version required to support RoCE and Persistent Memory?
- A. Oracle Linux 7.9
- B. Oracle Linux 8.0
- C. Oracle Linux 7.5
- D. Oracle Linux 7.7
Answer: A
Explanation:
RoCE (RDMA over Converged Ethernet) and Persistent Memory are features that are supported by Oracle Linux. The minimum version of Oracle Linux required to support RoCE and Persistent Memory is Oracle Linux 7.9.
RoCE is a low-latency, high-bandwidth networking technology that enables fast data transfer between servers using converged Ethernet networks. It is supported by Oracle Linux 7.9 and later versions, which includes the necessary kernel modules and user-space libraries to enable RoCE.
Persistent Memory is a technology that allows data to be stored in non-volatile memory (NVM) devices, such as NVDIMMs (Non-Volatile Dual In-line Memory Modules), which can be accessed at near-DRAM speeds. Oracle Linux 7.9 and later versions include support for Persistent Memory, which includes kernel modules and user-space libraries to enable Persistent Memory.
NEW QUESTION # 20
You are adding a disk expansion kit to a running Exadata X8M Database Machine's Database Servers, and have a filesystem layout that includes:
After running the following commands, which command needs to be run to add 20G of space to the filesystem mounted on /u01?
- A. # resize2fs +20G /dev/VGExaDb/LVDbOral
- B. # lvextend -L +20G -verbose /dev/mapper/VGExaDb-LVDbOral
- C. # xfs_growfs /uOl +20G
- D. # lvextend -L +20G -verbose /dev/VGExaDb/LVDbOral
Answer: B
NEW QUESTION # 21
You have a script with several CELLCLI commands that must be executed on each cell in your Exadata full rack. The script must run on each cell simultaneously. How must you achieve this?
- A. Copy and execute the script on all storage servers using the dcli command.
- B. Copy the script to all storage servers using the dcli command and manually execute it on each storage server using the DCLI command.
- C. Copy the script to all storage servers using the dcli command and manually execute it on all storage servers using the EXACLI command.
- D. Copy the script to all storage servers using the CELLCLI command and execute it on all storage servers in parallel using the CELLCLI command.
- E. Copy and execute the script on all storage servers using the EXACLI command.
Answer: E
NEW QUESTION # 22
Which two statements are true in regards to starting the Exadata Virtual Machine?
- A. To streamline the diagnosis of virtual machines, one ISO file is used for multiple Oracle Exadata System Software releases.
- B. To see Oracle Linux boot messages during guest startup, use -console option with the vm_maker -start-domain command.
- C. Use vm_maker boot-from-iso command to boot a virtual machine.
- D. Use vm_maker -auto-start command to configure a virtual machine to start automatically when the KVM host is started.
- E. Use vm_maker -start-domain to start a virtual machine manually.
Answer: D,E
Explanation:
Statement B is true as the vm_maker -start-domain command can be used to start a virtual machine manually, as stated in the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book (page 65).
Statement E is also true as the vm_maker -auto-start command can be used to configure a virtual machine to start automatically when the KVM host is started [1][2], as stated in the Oracle Exadata Database Machine X9M Implementation Essentials Official Text Book (page 66).
NEW QUESTION # 23
How do ASM failure groups provide redundancy?
- A. Extended Redundancy mirrors data across data centers providing the highest levels of data protection.
- B. Failure groups are created for each grid disk to ensure mirror copies are written to the same storage server for faster recovery after a physical disk failure.
- C. Failure groups contain all ASM disks in a single storage server preventing mirror copies being written to the same storage server.
- D. They ensure that the ASM Flex instances are enabled on a maximum of two database servers or VMs per cluster.
Answer: D
NEW QUESTION # 24
Which two statements are true about applying updates on Exadata systems?
- A. For regular Exadata updates, yum automatically installs a non-UEK kernel, which can be selected to boot from grub.
- B. To speed up applying storage server updates in a rolling manner, updating two storage servers simultaneously is recommended.
- C. When running a "yum update" for a new Exadata release, all other repositories should be disabled.
- D. Failed database server updates are rolled back to a working state on a previous release automatically.
- E. Updating kernel and RDMA packages on storage cells should be prevented by excluding them with the yum -exclude option.
- F. Failed storage server updates are automatically rolled back to a previous release.
Answer: D,F
Explanation:
When applying updates on Exadata systems, database server updates are automatically rolled back to a working state on a previous release if the update fails. This ensures that the system can be restored to a working state in the event of a failed update. Additionally, storage server updates are also automatically rolled back to a previous release in the event of a failed update.
This is documented in the Oracle Exadata Database Machine X9M Implementation Essentials official text book and more information can be found on the Oracle support website [1][2].
NEW QUESTION # 25
Which two statements are true about applying updates on Exadata systems?
- A. To speed up applying storage server updates in a rolling manner, updating two storage servers simultaneously is recommended.
- B. When running a "yum update" for a new Exadata release, all other repositories should be disabled.
- C. Failed storage server updates are automatically rolled back to a previous release.
- D. For regular Exadata updates, yum automatically installs a non-UEK kernel, which can be selected to boot from grub.
- E. Failed database server updates are rolled back to a working state on a previous release automatically.
- F. Updating kernel and RDMA packages on storage cells should be prevented by excluding them with the yum -exclude option.
Answer: D,E
NEW QUESTION # 26
You plan to monitor the status of the motherboard, memory, power, fans, and network cards on the database nodes in your Exadata Database Machine using Enterprise Manager.
Where must you set the thresholds for these hardware components and why, to assure that sensor readings, faults, and any related alerts, are visible in Enterprise Manager?
- A. No thresholds need to be set because they are preset in the ILOM and these are sufficient for monitoring.
- B. Set thresholds in ILOM and in Enterprise Manager because they are not preset anywhere and must be set in both places.
- C. No thresholds need to be set because they are preset in the ILOM and in Enterprise Manager
- D. Set thresholds only in ILOM because they are not preset anywhere but need to be set only in ILOM.
Answer: C
Explanation:
For Exadata systems, hardware monitoring for components like the motherboard, memory, power, fans, and network cards on the database nodes is managed through the Integrated Lights Out Manager (ILOM). The ILOM provides built-in thresholds and sensor readings that are automatically recognized by Oracle Enterprise Manager.
These thresholds and alerts are already configured within ILOM for Exadata components, ensuring seamless integration with Enterprise Manager for alerting and monitoring purposes.
Enterprise Manager uses these pre-set ILOM thresholds and does not require additional configuration for monitoring hardware components. Therefore, administrators benefit from preset alerting mechanisms that are sufficient for comprehensive hardware status visibility.
NEW QUESTION # 27
Which of the following is NOT a requirement when validating, receiving, unpacking, and planning access route and space requirements for Exadata Database Machine?
- A. A conditioned space is required to remove the packaging material to reduce particles before entering the data center.
- B. Oracle Exadata Rack may only be installed on raised floor environments.
- C. 914mm of space required above the rack height is required for maintenance access.
- D. The entire access route to the installation site should be free of raised-pattern flooring that can cause vibration.
- E. All four leveling and stabilizing feet should be raised and out of the way prior to moving the rack.
- F. The incline of any access route ramp must be less than or equal to 6 degrees.
Answer: A
NEW QUESTION # 28
Which statement is true about the patching features provided in Platinum Services?
- A. Oracle Platinum Service covers Exadata storage software and firmware patching, but customers must perform the database patching.
- B. Patching is done automatically during business hours.
- C. Patching services are available for the full software stack up to twice per year.
- D. The rolling and complete down time approaches are two options to patching.
Answer: A
NEW QUESTION # 29
What type of SRs does the ASR Manager generate for Exadata?
- A. operating system components
- B. data entry errors
- C. backup and restore failures
- D. software assets
- E. hardware assets
Answer: D,E
Explanation:
Oracle Auto Service Request (ASR) on Exadata Database Machines is designed to proactively monitor and detect hardware and software issues. When a problem is detected, ASR Manager automatically opens a service request (SR) with Oracle Support. The primary focus of ASR is on hardware assets, such as storage servers, database servers, and network components, as well as software assets related to Exadata System Software and Oracle Database configurations.
NEW QUESTION # 30
When receiving an Exadata Database Machine rack on site, which of the following statements is INCORRECT?
- A. Reuse the shipping brackets to permanently mount the rack to the floor.
- B. Front casters do not turn, you must steer the unit by moving the rear casters.
- C. Pushing on the side panels can tip the rack over.
- D. Four leveling feet share the load with the casters.
- E. Push Oracle Exadata Rack from behind when moving into place.
Answer: A
Explanation:
The handling and installation of an Exadata Database Machine rack require caution and adherence to recommended guidelines:
Shipping Brackets: Shipping brackets are specifically designed for transportation purposes and should not be reused for permanent installation. Permanent floor mounting should use approved rack-mounting equipment to ensure stability and safety .
Steering and Pushing the Rack: Exadata racks should be steered from the rear due to fixed front casters. It is critical to avoid pushing the rack from the side panels, which could cause it to tip over, presenting a serious safety risk. This careful movement ensures safe positioning and prevents damage to the equipment during installation.
NEW QUESTION # 31
Which two statements are true about enabling write-back flash cache?
- A. When enabling write-back flash cache in a non-rolling manner, you need to drop the Persistent Memory Commit Accelerator (PMEMLog) first.
- B. Write-back Flash Cache cannot be used on Extreme Flash Storage Servers.
- C. Before write-back flash cache is enabled, you need to drop the Flash Cache first.
- D. Write-back flash cache is on by default for High Capacity Storage Servers in High Redundancy configurations.
- E. When enabling write-back flash cache in a rolling manner, DBCLI should be used to inactivate the grid disks on all cells first.
Answer: A,E
Explanation:
When enabling write-back flash cache in a rolling manner, it is important to use DBCLI to inactivate the grid disks on all cells first so that all the cells are in the same state before the process is started. In a non-rolling manner, you must drop the Persistent Memory Commit Accelerator (PMEMLog) first. Write-back flash cache is not on by default for High Capacity Storage Servers in High Redundancy configurations and can be used on Extreme Flash Storage Servers. It's also important to check if it's necessary to drop the flash cache before enabling write-back flash cache.
NEW QUESTION # 32
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